/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package edu.uq.comp7705.servlet;

import edu.uq.comp7705.entity.Person;
import edu.uq.comp7705.entity.Session;
import edu.uq.comp7705.util.Util;
import edu.uq.comp7705.util.UtilDB;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author javierpanchi
 */
public class DrinksServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String path="";
        try {
            if (request.getParameter("opt") != null && request.getParameter("opt").equalsIgnoreCase("report")) {
                path="/jsp/drinksreport.jsp";
                Util.updateSession(request);
            }else if (request.getParameter("opt") != null && request.getParameter("opt").equalsIgnoreCase("bac")) {
                path="/jsp/bacreport.jsp";
                Integer drinks=0;
                double hours=0d;
                double totalAlcohol=0;  
                UtilDB utilDB=new UtilDB();
                Person person=(Person)request.getSession().getAttribute("person");
                for(Session session:(List<Session>)request.getSession().getAttribute("sessionDrink")){
                    if(session.getFacebookid().equalsIgnoreCase(request.getParameter("facebookId"))){
                        drinks=Util.getTotalDrinks(session);
                        hours=Util.getTotalTime(session);
                        totalAlcohol=Util.getTotalAlcoholLevel(session);
                        break;
                    }
                }
                double bac=Util.calculateBAC(totalAlcohol, hours, drinks, person.getWeight(), person.getGender().equalsIgnoreCase("M"));
                request.setAttribute("drinks", drinks);
                DecimalFormat df = new DecimalFormat("#.##");
                request.setAttribute("time", df.format(hours));
                request.setAttribute("BAC", df.format(bac));
            }else if (request.getParameter("opt") != null && request.getParameter("opt").equalsIgnoreCase("deleteDrinks")) {
                UtilDB utilDB=new UtilDB();
                Session session=(Session)((List<Session>)request.getSession().getAttribute("sessionDrink")).get(0);
                utilDB.deleteDrinkSessionByDrinkIdSessionId(new Integer(request.getParameter("drink")),session.getId());
            }else if (request.getParameter("opt") != null && request.getParameter("opt").equalsIgnoreCase("logout")) {
                path="/";
                UtilDB utilDB=new UtilDB();
                utilDB.closeSession(((Person)request.getSession().getAttribute("person")).getFacebookid());
                request.getSession().invalidate();
                
            }
            RequestDispatcher rd = request.getRequestDispatcher(path);
            rd.forward(request, response);
            
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
